In book(adsbygoogle = window.adsbygoogle || []).push({});

http://www.phy.uct.ac.za/people/horowitz/Teaching/lecturenotes.pdf

in section 2 it is described transition from Poisson bracket into Canonical Commutation Relations.

But it is written

The experimentally observed phenomenon of incompatible measurements suggests that position and momentum cannot benumber-valued functionsin QM.

What means "number-valued functions"?

I understand QM, but I do not understand this word, what he want to tell with it.

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Transition from Poisson bracket into Canonical Commutation Relations

**Physics Forums | Science Articles, Homework Help, Discussion**